<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>同步回调</title>
</head>
<body>
<script>
      /**
       *回调不是一定都是异步的，也存在同步阻塞的回调
       */
      let nums = [2,1,6,4,8,4,5,7,12];
      nums.forEach((value) =>{
          console.log(value)
      })
      console.log("hello");

</script>


</body>
</html>